Figure out resourceVersion

[tsloughter]

I don't think it is currently using resourceVersion correctly, at least in cases like the example which lists all pods for all namespaces.

Without a resourceVersion it will fetch all pods again on every reconnect after a timeout. But as far as I can tell resourceVersion is about the individual resource, like a single pod, and isn't clear if it can be used as the example currently is where the resourceVersion of last pod decoded is used as the version for the next request.